Loom dobby



mms, 1924. v v H 1,487,654 d H. HATTOY LOOM BOBBY Fiiea March 22. 192332 Patented Mar. 18, 1924.

Midi? HENRI HATTOY, F BLACKSTONE, IVILSSACI'USETTS, A SSIGNOR T0CRGMPTON 35 KNOWLES LOOEI 'WORKS, OF FOEYCESTER, MASSACHUSETTS, ACORPORATION GF MASSACHUSETTS.

LOOM BOBBY.

Application filed March 22, 1923.

To all lwhom t may concern.'

Be it known that I, HENRI Harrer, a citizen of the United States,residing at Blackstone, in the county of Worcester and e State ofMassachusetts, have invented a new and useful Loom Dobby, of which thefollowing is a specification.

This invention relates to a loom dobby of the general type shown in theprior patent lo to Selley No. 955,559, issued April 19, 1910. rlhispatent discloses a dobby having a lower or main pattern cylinder and anupper or auxiliary cylinder, the dobby being particularly designed forweaving le handkerchiefs, towels or other similar articles in which anend border is inserted at frequently occurring points in the length ofthe fabric. Y

lt is the object of my invention to improve the construction of dobbiesof this general type by providing novel devices for connecting the upperand lower dobby iingers. My improved connections not only accomplish thenecessary associated movements of the dobby lingers but also act asguides for the lingers, thereby reducing the number of guide pinsheretofore specially provided for this purpose.

My invention further relates to arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appended claims.

A preferred form of the invention' is shown in the drawings in whichFig. 1 is a side elevation of parts of a dobby embodying myimprovements;

Fig. 2 is a sectional side elevation of the dobby;

Fig. 3 is a detail end elevation thereof;

Fig. 4 is a detail sectional plan view, taken along the line 4 4 in Fig.3; and

Fig. 5 is a partial detail view of one of my improved links orconnectors.

Referring to the drawings, I have shown construction shown in the priorpatent to fa'elley and comprises a frame 10 supporting a lower or mainpattern cylinder 11, an upper or auxiliary pattern cylinder 12, and arocking lever 13 mounted on a fixed pivot 14. The dobby is provided withthe usual series of lower dobby fingers 15 and upper dobby fingers 16,these fingers being controlled by pattern chains on the cylinders 11 and12 respectively. A single bar 17 and parts of a dobby which is ingeneral of theV Serial No. 62S,778.

pin 18 of the lower pattern chain and corresponding parts 19 and 20 ofthe upper pattern chain are indicated in'Fig. 2.

A ratchet 21 (Fig. 1) is fixed to the lower pattern cylinder 11 and isengaged by a feed pawl 22 pivoted at 23 to the rocking lever Y 13. Astud 24 in the side of the pawl 22 rests on a link or rod 25 which issupported at one end on a projection 26 on the side of a special lowerdobby finger 15a. The opposite end of the link 25 has a slottedconnection with pin 27 in a lever 28 mounted on a fixed pivot 29andrconnected by a link 30 to a lever 31 pivoted at 32 in the upper partof the dobby frame.

This upperY lever 3l has Va projection 33 which cooperates with aspecial pattern chain 34 on the end of the upper cylinder 12. The partsare so proportioned that vwhen in the position shown in Fig. 1 the pawl22 will actuate the lower or main cylinder 11 to weave the body of thehandkerchief or other fabric. 1f, however, the dobby finger 15a israised by a pin, such as 18, in the lower pattern chain, the link 25will be swung about one end on the stud 27 and will'engage the stud 24in the pawl 22, raising the saine out of operative position. At the sametime, the upper pattern cylinder will be started in operation by feedingmechanism not shown and will proceed to weave a border or other specialde-v sign. VWhen a projection 35 on the pattern chain 34 engages theprojection33 on the lever 81 at the completion of the border or design,the lever 31 will be raised and will act through the link 8O and lever28 to lower the Vstud 27, swinging the link 25 downward about theprojection 26 and permitting the pawl 22 to again engage and drive thelower pattern cylinder 11. The parts thus far described in themselvesform no part of my present invention and for a more complete descriptionof the construction and operation thereof, reference is made to theSelley Patent No. 955,559.

My invention relates specifically' to the connections between the lowerdobbyiingers 15 and the associated upper lingers 16. .For this purpose,l provide the links 40 (Fig. 3) each link having a reverse bend 41 atits upper end and having an offset projection 42 (Fig. 5) at its lowerend.

In assembling my improved links or connectors, I preferably arrange themin pairs to slide in recesses 43 in fixed cross bars 44, as indicated inFig. 4. Each pair is separated from the next pair by two dobby fingers15 of the lower set and by two lingers 16 of the ripper set. The bentupper ends 41 are turned in opposite directions so that they each engagethe upper edge of one of the pair of adjacent lingers 16 and the preLjections 42 are correspondingly reversed and each project under one ol'the associated pair ol lower lingers 15.

Fixed guide pins or rot r alternate with the links 40, as shown in i ig.4, so that each finger is guided on each side by a link or by a specialguide pin 45.

vWith this construction, the lower lingers 15 may .be moved upwardwithout moving the links 40, as the lingers merely rest upon the upperportions of' the projections 42. lllhenever an upper finger i6 israised, hovever, the corresponding lower linger 15 is also raised, thisassociated movement being necessary for the operation el the dobby. It'will thus be seen that l have provided a connection in which the linksmove only when the upper lingers move and that l have reduced the numberof parts by utilizing the links as guides between alternate lingers.

Having thus described my invention and the advantages thereof, l do notwish to be limited to the details herein disclosed otherwise than as set'forth in the claims, but what l. claim is 1. In a loom dobby, a mainpattern cylinder, an auxiliary pattern cylinder, upper and lower dobbyfingeis co-operating with said cylinders respectively, and linksconnecting said upper and lower lingers in pairs, each lower fingerbeing movable upward by its pattern cylinder while the associated linkand upper finger remain at rest.

2. ln loom dobby, a main pattern cylinder, an auxiliary patterncylinder, upper and lower dobby lingers co-operating with said cylindersrespectively, and links connecting said upper and lower lingers inpairs, each link being connected to an upper lever Jfor upward movementtherewith and having a projection underlying the associated lowerlinger.

3. In a loom dob y, a main pattern cylinder, an auxiliary patterncylinder, upper and lower dobby lingers co-operating with said cylindersrespectively, and links connecting said upper and lower lingers inpairs, each link forming a lifting connection i remesa from an upperlinger to an associated lower linger but leaving said lower ringer freeto move upward independently of said link and upper linger.

4. ln a loom dobby, a main pattern cylinder, an auxiliary patterncylinder, upper and lower dobby lingers co-operating with said cylindersrespectively, and links connecting said upper and lower fingers inpairs, each link having a return bend at its upper end embracing anupper nger and having an oli'set projection in its lower` portionextending under the associated lower linger.

in a leoni dobby, a main pattern cylinder, an auxiliary patterncylinder, upper and lower dobby fingers co-operating with said cylindersrespectively, and links connecting said upper and lowerY lingers in i,said links being vertically slidable in u upper and lower members andforming separating guides lor said fingers.

G. ln alooni dobby, a main pattern cylinder, an auxiliary patterncylinder, upper and lower dobby lingers co-operating with said cylindersrespectively, and links connecting said upper and lower lingers inpairs, said links being mounted in pairs Jfor sliding n'ioveinent infixed upper and .lower members and engaging the upper and lower lingersat each side of said links.

ln loom dobby, a main pattern cylinder, an auxiliary pattern cylinder,upper and lower dobby fingers co-operating with said cylindersrespectively, and links connecting said upper and lower fingers inpairs, said links being vertically slidable in lined upper and lowermembers and being disposed in pairs between alternate ngers, alsoconstituting guides therefor on one side el each finger.

8. ln a loom dobby, a main pattern cylinn der, an auxiliary patterncylinder, upper and lower dobby lingers co-operating with said cylindersrespectively, links connecting said upper and lower lingers in pairs,said links being vertically slidable in liXed upper and lower membersand being disposed in pairs between alternate lingers, also constitutingguides therefor on one side of each linger, and a series or" lixed guidepins alternating with said links and engaging the opposite sides of saidlingers.

ln testimony whereof I have hereunto affixed my signature.

HENR HATTOY.

